Ignition Timing: Adjustments

Timing Adjustment:

PREPARATION

1. Warm engine to operating temperature.
2. Turn all electrical loads "OFF:"
^ Headlight Switch
^ Blower Switch
^ Rear Window Defroster Switch
3. Connect Mazda SST (49 B019 9A0) to data link connector.
4. Connect timing light. Connect tachometer to data link connector terminal IG-.

U-01 Data Link Connector (EM):

ADJUSTMENT

NOTE: If SST is not used, connect jumper wire between terminals TEN and GND of data link connector.

1. Check for idle speed of 650 ± 50 rpm; adjust if needed.
2. On SST, set switch A to position 1 and test switch to SELF TEST.
3. Check if timing mark (yellow) on crank pulley aligns with mark on timing belt cover at 10° ± 1° BTDC.
4. If marks are not aligned, loosen lock bolts and turn distributor to make adjustment. When finished, tighten bolts to 14 - 18 ft lb (19 - 25 Nm).

CAUTION: Do not pinch condenser wire when turning distributor mount bolt.

5. Disconnect SST or remove jumper wire. Check that timing falls within a range of 6° - 18° BTDC.